A magnetic resonance breast imaging coil structure

Abstract

The utility model relates to a magnetic resonance breast imaging coil structure, belonging to the technical field of magnetic resonance imaging equipment, comprising a shell, wherein two groups of coil supports are installed inside the shell, and a special-shaped birdcage coil component is installed on the surface of the coil support; the special-shaped birdcage coil component comprises an upper coil in a trumpet shape, a lower coil in a cylindrical shape is arranged below the upper coil, and a plurality of uniformly distributed capacitors are arranged between the upper coil and the lower coil, and the two poles of the capacitor are electrically connected to the upper coil and the lower coil respectively; the utility model sets the upper coil in a trumpet shape, and matches the structure of the fitting ring and the arc plate of the coil support, so that the prepared breast imaging coil structure can offset the central imaging area to one end of the upper coil while fitting the structural characteristics of the breast tissue, which is more conducive to imaging the cone-like structure of the breast tissue. The utility model has a simple structure, low cost, high stability and broad potential application scenarios.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic resonance imaging equipment, and in particular relates to a magnetic resonance breast imaging coil structure. Background Art

[0002] Breast cancer has always been one of the most common malignant tumors in women, seriously endangering women's physical and mental health, and is known as the "pink killer". With the continuous development of medical care, breast cancer has shown good early controllability, that is, clinical treatment plans and cures for early breast cancer are relatively complete. In this context, breast cancer screening is becoming increasingly important, and screening methods have also developed in a diversified manner. Among them, magnetic resonance imaging (MRI), as a medical imaging method that has no radiation to the human body and has a high resolution of soft tissue, has unique advantages in breast screening.

[0003] In order to pursue images with higher resolution and higher signal-to-noise ratio, in low-field MRI systems, the fit between the MRI breast imaging coil structure and human tissue and the uniformity of the magnetic field distribution in the coil imaging area play a decisive role. Therefore, how to design the structure of the MRI breast imaging coil to expand the field uniformity and magnetic field strength in the target area, while maximizing the fit between the MRI breast imaging coil and the breast area, so as to obtain MRI images with higher signal-to-noise ratio is a technical problem that needs to be solved urgently.

[0004] Currently, most commercial breast imaging coils are hemispherical multi-channel coils. On the one hand, the structure of this type of coil does not completely match the shape characteristics of breast tissue, so the optimization of field uniformity and field strength in the imaging area is limited, especially in low-field magnetic resonance systems, where the image signal-to-noise ratio is inferior to that of high-field systems. On the other hand, due to the coupling between channels of this type of coil, the channels need to be decoupled as much as possible, so the development process is relatively complicated and the R&D cost is high. Utility Model Content

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a magnetic resonance breast imaging coil structure.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A magnetic resonance breast imaging coil structure comprises a shell, two sets of coil supports are installed inside the shell, and a special-shaped birdcage coil assembly is installed on the surface of the coil support;

[0008] The special-shaped birdcage coil assembly includes a trumpet-shaped upper coil, a cylindrical lower coil is arranged below the upper coil, and a plurality of uniformly distributed capacitors are arranged between the upper coil and the lower coil, and the two poles of the capacitors are electrically connected to the upper coil and the lower coil respectively.

[0009] The main magnetic field direction of the low-field magnetic resonance system is vertical up and down. The magnetic field of the traditional low-pass birdcage coil is a horizontal circular polar field perpendicular to the cylindrical axis. When it is erected in the low-field magnet, it spontaneously meets the vertical requirement of the coil's radio frequency field and the main magnetic field. Under this premise, the utility model enlarges one port of the low-pass birdcage coil to form a new structure combining the upper horn shape and the lower cylindrical shape, which can cause the central imaging field area to shift in the direction toward the horn-shaped end.

[0010] Furthermore, the shell is a rectangular box with an open bottom.

[0011] Furthermore, an arc-shaped portion is provided at the top of the shell, and the arc-shaped portion matches the front chest contour of the human body. Two oppositely arranged circular holes are provided on the arc-shaped portion, and the circular holes match the breast part of the human body.

[0012] Furthermore, the coil support includes a fitting ring, the top of which cooperates with the circular hole and is fixedly connected, a support ring is arranged below the fitting ring, and a plurality of vertical plates and arc plates distributed in a circular array are arranged between the fitting ring and the support ring.

[0013] Furthermore, two ends of the vertical plate are fixedly connected to the bottom end of the fitting ring and the outer circumference of the support ring respectively.

[0014] Furthermore, the two ends of the arc plate are fixedly connected to the bottom end of the fitting ring and the inner circumference of the support ring respectively, and the arc surface of the arc plate fits the outer shape of the breast part of the human body.

[0015] Furthermore, the upper coil is attached and fixed to the surfaces of the fitting ring and the arc plate, and the lower coil is attached and fixed to the surfaces of the supporting ring and the arc plate.

[0016] Furthermore, the number of the capacitors is the same as the number of the arc plates.

[0017] Beneficial effects:

[0018] The utility model sets the upper coil into a horn shape on the basis of the low-pass birdcage coil, and matches the structure of the fitting ring and arc plate of the coil support, so that the prepared breast imaging coil structure fits the structural characteristics of breast tissue and shifts the central imaging area to one end of the upper coil, which is more conducive to imaging the cone-like structure of breast tissue;

[0019] The special-shaped birdcage coil assembly of the utility model has a uniform magnetic field distribution in the central imaging area and a strong signal, and can obtain MRI images with a higher signal-to-noise ratio. At the same time, the magnetic field distribution is mostly concentrated on the inner side of its structure, and has good beam magnetic characteristics. Therefore, the interference between the two groups of special-shaped birdcage coil assemblies is relatively weak, and the coupling between the coils is significantly suppressed, which has a relatively good and independent performance for bilateral breast imaging.

[0020] The breast imaging coil of the utility model has a simple structure, low cost, and stability, and at the same time has room for improvement of breast intervention coils, and has broad potential application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a stereoscopic diagram of a magnetic resonance breast imaging coil structure of the utility model;

[0023] Figure 2 It is a cross-sectional view of the housing of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the coil support of the utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the upper coil and the lower coil of the utility model.

[0026] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0027] 1. Shell; 101. Arc-shaped portion; 102. Round hole; 2. Coil bracket; 201. Fitting ring; 202. Support ring; 203. Vertical plate; 204. Arc plate; 3. Special-shaped birdcage coil assembly; 301. Upper coil; 302. Lower coil; 303. Capacitor. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-Figure 4As shown, a magnetic resonance breast imaging coil structure includes a shell 1, two sets of coil brackets 2 are installed inside the shell 1, and a special-shaped birdcage coil assembly 3 is installed on the surface of the coil bracket 2;

[0030] The housing 1 is a rectangular box with an open bottom. An arc portion 101 is provided at the end of the housing 1. The arc portion 101 matches the front chest contour of a human body. Two oppositely arranged circular holes 102 are provided on the arc portion 101. The circular holes 102 match the breast part of a human body.

[0031] The coil support 2 includes a fitting ring 201, the top of which cooperates with the circular hole 102 and is fixedly connected at the same time, a support ring 202 is arranged below the fitting ring 201, and a plurality of vertical plates 203 and arc plates 204 distributed in a circular array are arranged between the fitting ring 201 and the support ring 202, the two ends of the vertical plates 203 are respectively fixedly connected to the bottom end of the fitting ring 201 and the outer circumference of the support ring 202, the two ends of the arc plates 204 are respectively fixedly connected to the bottom end of the fitting ring 201 and the inner circumference of the support ring 202, and the arc surface of the arc plates 204 fits the outer shape of the breast part of the human body;

[0032] The special-shaped birdcage coil assembly 3 includes an upper coil 301 in the shape of a trumpet, and a lower coil 302 in the shape of a cylinder is arranged below the upper coil 301. The upper coil 301 is attached and fixed to the surfaces of the fitting ring 201 and the arc plate 204, and the lower coil 302 is attached and fixed to the surfaces of the supporting ring 202 and the arc plate 204. A plurality of uniformly distributed capacitors 303 are arranged between the upper coil 301 and the lower coil 302. The number of the capacitors 303 is the same as the number of the arc plates 204, and the two poles of the capacitors 303 are electrically connected to the upper coil 301 and the lower coil 302, respectively.

[0033] Working principle:

[0034] When using the magnetic resonance breast imaging coil structure of the present invention, the patient lies prone on the shell 1, and the breast tissue is placed in the coil support 2 and the special-shaped birdcage coil assembly 3. The fitting ring 201 and the arc plate 204 can be well matched with the breast tissue in structure. After connecting to the system, the special-shaped birdcage coil assembly 3 forms a low-pass birdcage coil, and the uniform magnetic field formed by it is mainly distributed inside the coil support 2, which can avoid the coupling of the magnetic fields between the two groups of special-shaped birdcage coil assemblies 3, and perform magnetic resonance imaging of the breast area; after the imaging is completed, the patient can get up and leave.

[0035] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The above contents are merely examples and explanations of the structure of the utility model. The technicians in the technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A magnetic resonance breast imaging coil structure, comprising a housing (1), characterized in that: Two groups of coil supports (2) are installed inside the housing (1), and a special-shaped birdcage coil assembly (3) is installed on the surface of the coil support (2); The special-shaped birdcage coil assembly (3) comprises an upper coil (301) in a trumpet shape, a lower coil (302) in a cylindrical shape is arranged below the upper coil (301), and a plurality of uniformly distributed capacitors (303) are arranged between the upper coil (301) and the lower coil (302), and two poles of the capacitor (303) are electrically connected to the upper coil (301) and the lower coil (302), respectively.

2. The magnetic resonance breast imaging coil structure according to claim 1, characterized in that: The shell (1) is a rectangular box with an open bottom.

3. The magnetic resonance breast imaging coil structure according to claim 1, characterized in that: The top end of the shell (1) is provided with an arc-shaped portion (101), and the arc-shaped portion (101) is provided with two circular holes (102) arranged opposite to each other.

4. The magnetic resonance breast imaging coil structure according to claim 3, characterized in that: The coil support (2) comprises a fitting ring (201), the top end of the fitting ring (201) cooperates with the circular hole (102) and is fixedly connected thereto, a support ring (202) is arranged below the fitting ring (201), and a plurality of vertical plates (203) and arc plates (204) distributed in a circular array are arranged between the fitting ring (201) and the support ring (202).

5. The magnetic resonance breast imaging coil structure according to claim 4, characterized in that: The two ends of the vertical plate (203) are respectively fixedly connected to the bottom end of the fitting ring (201) and the outer circumference of the supporting ring (202).

6. The magnetic resonance breast imaging coil structure according to claim 4, characterized in that: The two ends of the arc plate (204) are respectively fixedly connected to the bottom end of the fitting ring (201) and the inner circumference of the support ring (202).

7. The magnetic resonance breast imaging coil structure according to claim 4, characterized in that: The upper coil (301) is attached and fixed to the surfaces of the fitting ring (201) and the arc plate (204), and the lower coil (302) is attached and fixed to the surfaces of the supporting ring (202) and the arc plate (204).

8. The magnetic resonance breast imaging coil structure according to claim 4, characterized in that: The number of the capacitors (303) is the same as the number of the arc plates (204).

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